Re: Enabling RDPMC in user space by default

[Zwane Mwaikambo]

On Thu, 1 Dec 2005, Andi Kleen wrote:

> > I agree that the NMI watchdog is very important, but my main objection is 
> > trying to provide a stable interface for this, i would rather see a 
> > seperate tool do it (as cumbersome as it may be) even if it meant that 
> > the external tool simply did what you intend on doing in the kernel.
> 
> But why an external tool when the nmi watchdog needs this anyways?

We'll probably have the NMI watchdog ticking at a lower frequency anyway 
and isn't always enabled. Although i recall you want NMI watchdog on by 
default too on i386 (which i don't have a problem with). The reason for 
the external tool is because that allows more flexibility for profiling 
tools, that is more PMCs can be used if needed by the user.

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